Update files from markdown-code-runner

Author: github-actions[bot]

README.md

@@ -550,7 +550,8 @@ positional arguments:
                         Subcommands
     merge               Combine multiple (or a single) `requirements.yaml` or
                         `pyproject.toml` files into a single Conda installable
-                        `environment.yaml` file.
+                        `environment.yaml` file or Pixi installable
+                        `pixi.toml` file.
     install             Automatically install all dependencies from one or
                         more `requirements.yaml` or `pyproject.toml` files.
                         This command first installs dependencies with Conda,
@@ -603,30 +604,33 @@ See `unidep merge -h` for more information:
 <!-- ⚠️ This content is auto-generated by `markdown-code-runner`. -->
 ```bash
 usage: unidep merge [-h] [-o OUTPUT] [-n NAME] [--stdout]
-                    [--selector {sel,comment}] [-d DIRECTORY] [--depth DEPTH]
-                    [-v]
+                    [--selector {sel,comment}] [--pixi] [-d DIRECTORY]
+                    [--depth DEPTH] [-v]
                     [-p {linux-64,linux-aarch64,linux-ppc64le,osx-64,osx-arm64,win-64}]
                     [--skip-dependency SKIP_DEPENDENCY]
                     [--ignore-pin IGNORE_PIN] [--overwrite-pin OVERWRITE_PIN]
 
 Combine multiple (or a single) `requirements.yaml` or `pyproject.toml` files
-into a single Conda installable `environment.yaml` file. Example usage:
-`unidep merge --directory . --depth 1 --output environment.yaml` to search for
-`requirements.yaml` or `pyproject.toml` files in the current directory and its
-subdirectories and create `environment.yaml`. These are the defaults, so you
-can also just run `unidep merge`.
+into a single Conda installable `environment.yaml` file or Pixi installable
+`pixi.toml` file. Example usage: `unidep merge --directory . --depth 1
+--output environment.yaml` to search for `requirements.yaml` or
+`pyproject.toml` files in the current directory and its subdirectories and
+create `environment.yaml`. These are the defaults, so you can also just run
+`unidep merge`.
 
 options:
   -h, --help            show this help message and exit
   -o, --output OUTPUT   Output file for the conda environment, by default
-                        `environment.yaml`
+                        `environment.yaml` or `pixi.toml` if `--pixi` is used
   -n, --name NAME       Name of the conda environment, by default `myenv`
   --stdout              Output to stdout instead of a file
   --selector {sel,comment}
                         The selector to use for the environment markers, if
                         `sel` then `- numpy # [linux]` becomes `sel(linux):
                         numpy`, if `comment` then it remains `- numpy #
                         [linux]`, by default `sel`
+  --pixi                Generate a `pixi.toml` file instead of
+                        `environment.yaml`
   -d, --directory DIRECTORY
                         Base directory to scan for `requirements.yaml` or
                         `pyproject.toml` file(s), by default `.`